Highest Common Factor of 84, 315, 840 using Euclid's algorithm
Created By : Jatin Gogia
Reviewed By : Rajasekhar Valipishetty
Last Updated : Apr 06, 2023
HCF Calculator using the Euclid Division Algorithm helps you to find the Highest common factor (HCF) easily for 84, 315, 840 i.e. 21 the largest integer that leaves a remainder zero for all numbers.
HCF of 84, 315, 840 is 21 the largest number which exactly divides all the numbers i.e. where the remainder is zero. Let us get into the working of this example.
Consider we have numbers 84, 315, 840 and we need to find the HCF of these numbers. To do so, we need to choose the largest integer first and then as per Euclid's Division Lemma a = bq + r where 0 ≤ r ≤ b
Highest common factor (HCF) of 84, 315, 840 is 21.
HCF(84, 315, 840) = 21
HCF of 84, 315, 840 using Euclid's algorithm
Highest common factor or Highest common divisor (hcd) can be calculated by Euclid's algotithm.
Highest common factor (HCF) of 84, 315, 840 is 21.
Highest Common Factor of 84,315,840 is 21
Step 1: Since 315 > 84, we apply the division lemma to 315 and 84, to get
315 = 84 x 3 + 63
Step 2: Since the reminder 84 ≠ 0, we apply division lemma to 63 and 84, to get
84 = 63 x 1 + 21
Step 3: We consider the new divisor 63 and the new remainder 21, and apply the division lemma to get
63 = 21 x 3 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 21, the HCF of 84 and 315 is 21
Notice that 21 = HCF(63,21) = HCF(84,63) = HCF(315,84) .
We can take hcf of as 1st numbers and next number as another number to apply in Euclidean lemma
Step 1: Since 840 > 21, we apply the division lemma to 840 and 21, to get
840 = 21 x 40 + 0
The remainder has now become zero, so our procedure stops. Since the divisor at this stage is 21, the HCF of 21 and 840 is 21
Notice that 21 = HCF(840,21) .
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Frequently Asked Questions on HCF of 84, 315, 840 using Euclid's Algorithm
1. What is the Euclid division algorithm?
Answer: Euclid's Division Algorithm is a technique to compute the Highest Common Factor (HCF) of given positive integers.
2. what is the HCF of 84, 315, 840?
Answer: HCF of 84, 315, 840 is 21 the largest number that divides all the numbers leaving a remainder zero.
3. How to find HCF of 84, 315, 840 using Euclid's Algorithm?
Answer: For arbitrary numbers 84, 315, 840 apply Euclid’s Division Lemma in succession until you obtain a remainder zero. HCF is the remainder in the last but one step.